Method for obtaining high-resolution performance from a single-chip colour image sensor

Citation

(2006), "Method for obtaining high-resolution performance from a single-chip colour image sensor", Sensor Review, Vol. 26 No. 4. https://doi.org/10.1108/sr.2006.08726dad.009

Method for obtaining high-resolution performance from a single-chip colour image sensor

Keywords: Image sensors, Patents

Title: Method for obtaining high-resolution performance from a single-chip colour image sensorApplicant: Cognex Technology and InvestC (US)Patent number: US6970608Publication date: 29 November 2005

A method is provided for obtaining high-resolution performance from a standard image sensor, such as a single-chip image sensor. Since single- chip colour image sensing is often the least expensive way to obtain colour images, the invention helps to lower the cost of high-resolution machine vision performance. The colour image produced by the single-chip image sensor is processed in two ways at run- time. In one stage of run-time, processing is performed on the original colour image provided by the image sensor, including normal low-resolution image processing and low-resolution machine vision analysis. In another stage of run-time, a high-resolution search model is determined to search the colour image using knowledge of the geometric properties of the arrangement of the pixels of the low- resolution image sensor, and the sub- pixel phase of the high-resolution search model. The invention can as much as double the accuracy of machine vision analysis using a standard colour camera.